| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a long [noun] [modal v] | 45 |
|
| 2 | a long [noun sg] [modal v] | 45 |
|
| 3 | a [adj] period [modal v] | 34 |
|
| 4 | a long period [modal v] | 10 |
|
| 5 | [art] long period [modal v] | 10 |
|
